Re: [Qemu-devel] [PATCH v3 0/4] VHD/VPC format compatibility

[Kevin Wolf <kwolf@redhat.com>]

Am 25.02.2016 um 18:27 hat Jeff Cody geschrieben:
> Changes from v3:
> 
> Patch 2: Added a sample image & tests for Disk2vhd
> Patch 3: When using force_size, set the CHS geometry to max
>          (as Disk2vhd does), to maximize backward compatibility (thanks Peter)
> Patch 4: Updated test results due to the above changes in patch 3
> 
> Changes from v2:
> 
> Patches 2,4: Just use qemu-io instead of a qemu instance (thanks Kevin, Max)
> Patch 3: Use "qem2" for the creator app field, when forcing the size (thanks Kevin)
> 
> This is a long-standing issue that has come up many times, and has had
> several different patches posted to fix it.  Virtual PC, and Hyper-V
> calculate the disk geometry differently for VHD, leading to compatibility
> issues.
> 
> We want to fix these compatibility problems, however we want to make sure
> we do not break backwards compatibility.
> 
> There are two areas of compatibility addressed:
> 
> * Reading images (Patch 1)
> * Creating images (Patch 3)
> 
> Please see the commit messages in Patches 1,3 for details.

Thanks, applied to the block branch.

Kevin